Table 2 The obtained factors with total variances explained in descending order
Component | Initial eigen values | ||
|---|---|---|---|
Total | % of Variance | Cumulative % | |
1. Caffeine picks me up when I’m feeling tired | 6.840 | 42.747 | 42.747 |
2. I am easily stressed after having caffeine | 1.612 | 10.077 | 52.824 |
3. Caffeine improves my athletic performance | 1.394 | 8.713 | 61.537 |
4. I feel less sleepy after having caffeine | 1.015 | 6.343 | 67.879 |
5. Caffeine improves my mood | .806 | 5.038 | 72.917 |
6. Workouts are better after having caffeine | .645 | 4.029 | 76.946 |
7. Caffeine increases my motivation to work | .545 | 3.408 | 80.354 |
8. Caffeine at any time throws off my sleep | .488 | 3.048 | 83.403 |
9. Caffeine makes me feel nervous | .480 | 3.000 | 86.403 |
10. Caffeine makes me feel more alert | .433 | 2.709 | 89.112 |
11. Caffeine improves my concentration | .372 | 2.325 | 91.437 |
12. Caffeine helps me work over long period of time | .340 | 2.122 | 93.559 |
13. I would be unable to function without caffeine | .321 | 2.008 | 95.566 |
14. Caffeine improves my attention | .294 | 1.839 | 97.406 |
15. I can exercise longer if I have caffeine | .232 | 1.452 | 98.858 |
16. Caffeine makes me feel more energetic | .183 | 1.142 | 100.000 |